Photoshop stepped onto the scene 20 years ago today, changing the face of photoediting, altering the way we weight the truthfulness of images, and introducing "'Shopped!" into the language of internet pundits everywhere. Check out our most popular Photoshop tutorials inside.

Over the years as time savers and bits of weekend fun, we've featured a variety of popular Photoshop tips and tricks. Before we share the links though, here are some random facts about Photoshop and an interesting mini-documentary about the founding of Photoshop.

Photoshop was invented by a University of Michigan PhD student named Thomas Knoll. Knoll's brother John worked for Industrial Light and Magic and encouraged Thomas to continue developing the software—apparently the imagery-manipulation gene is strong in the Knoll family.

Despite the widespread prevalence of using "Photoshop" as a verb, Adobe strongly discourages it.

The use of Photoshop in advertising is so widespread that fairly frequently a photo-editing mishap leads to a humorous outcome. Photoshop Disasters is a popular blog that catalogs mishaps in advertising like phantom hands, missing fingers, and super models with no navels.

The list below highlights the top ten Photoshop-related articles that have appeared on Lifehacker. If you'd like to explore more Photoshop tips and tricks, feel free to browse through the archives of the Photoshop tag.